diff -r 000000000000 -r 6474c204b198 modules/libmar/verify/cryptox.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/modules/libmar/verify/cryptox.c Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,271 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifdef XP_WIN +#ifndef WIN32_LEAN_AND_MEAN +#define WIN32_LEAN_AND_MEAN +#endif +#endif + +#include +#include "cryptox.h" + +#if defined(MAR_NSS) + +/** + * Loads the public key for the specified cert name from the NSS store. + * + * @param certName The cert name to find. + * @param publicKey Out parameter for the public key to use. + * @param cert Out parameter for the certificate to use. + * @return CryptoX_Success on success, CryptoX_Error on error. +*/ +CryptoX_Result +NSS_LoadPublicKey(const char *certNickname, + SECKEYPublicKey **publicKey, + CERTCertificate **cert) +{ + secuPWData pwdata = { PW_NONE, 0 }; + if (!cert || !publicKey || !cert) { + return CryptoX_Error; + } + + /* Get the cert and embedded public key out of the database */ + *cert = PK11_FindCertFromNickname(certNickname, &pwdata); + if (!*cert) { + return CryptoX_Error; + } + *publicKey = CERT_ExtractPublicKey(*cert); + if (!*publicKey) { + CERT_DestroyCertificate(*cert); + return CryptoX_Error; + } + return CryptoX_Success; +} + +CryptoX_Result +NSS_VerifyBegin(VFYContext **ctx, + SECKEYPublicKey * const *publicKey) +{ + SECStatus status; + if (!ctx || !publicKey || !*publicKey) { + return CryptoX_Error; + } + + /* Check that the key length is large enough for our requirements */ + if ((SECKEY_PublicKeyStrength(*publicKey) * 8) < + XP_MIN_SIGNATURE_LEN_IN_BYTES) { + fprintf(stderr, "ERROR: Key length must be >= %d bytes\n", + XP_MIN_SIGNATURE_LEN_IN_BYTES); + return CryptoX_Error; + } + + *ctx = VFY_CreateContext(*publicKey, NULL, + SEC_OID_ISO_SHA1_WITH_RSA_SIGNATURE, NULL); + if (*ctx == NULL) { + return CryptoX_Error; + } + + status = VFY_Begin(*ctx); + return SECSuccess == status ? CryptoX_Success : CryptoX_Error; +} + +/** + * Verifies if a verify context matches the passed in signature. + * + * @param ctx The verify context that the signature should match. + * @param signature The signature to match. + * @param signatureLen The length of the signature. + * @return CryptoX_Success on success, CryptoX_Error on error. +*/ +CryptoX_Result +NSS_VerifySignature(VFYContext * const *ctx, + const unsigned char *signature, + unsigned int signatureLen) +{ + SECItem signedItem; + SECStatus status; + if (!ctx || !signature || !*ctx) { + return CryptoX_Error; + } + + signedItem.len = signatureLen; + signedItem.data = (unsigned char*)signature; + status = VFY_EndWithSignature(*ctx, &signedItem); + return SECSuccess == status ? CryptoX_Success : CryptoX_Error; +} + +#elif defined(XP_WIN) +/** + * Verifies if a signature + public key matches a hash context. + * + * @param hash The hash context that the signature should match. + * @param pubKey The public key to use on the signature. + * @param signature The signature to check. + * @param signatureLen The length of the signature. + * @return CryptoX_Success on success, CryptoX_Error on error. +*/ +CryptoX_Result +CyprtoAPI_VerifySignature(HCRYPTHASH *hash, + HCRYPTKEY *pubKey, + const BYTE *signature, + DWORD signatureLen) +{ + DWORD i; + BOOL result; +/* Windows APIs expect the bytes in the signature to be in little-endian + * order, but we write the signature in big-endian order. Other APIs like + * NSS and OpenSSL expect big-endian order. + */ + BYTE *signatureReversed; + if (!hash || !pubKey || !signature || signatureLen < 1) { + return CryptoX_Error; + } + + signatureReversed = malloc(signatureLen); + if (!signatureReversed) { + return CryptoX_Error; + } + + for (i = 0; i < signatureLen; i++) { + signatureReversed[i] = signature[signatureLen - 1 - i]; + } + result = CryptVerifySignature(*hash, signatureReversed, + signatureLen, *pubKey, NULL, 0); + free(signatureReversed); + return result ? CryptoX_Success : CryptoX_Error; +} + +/** + * Obtains the public key for the passed in cert data + * + * @param provider The cyrto provider + * @param certData Data of the certificate to extract the public key from + * @param sizeOfCertData The size of the certData buffer + * @param certStore Pointer to the handle of the certificate store to use + * @param CryptoX_Success on success +*/ +CryptoX_Result +CryptoAPI_LoadPublicKey(HCRYPTPROV provider, + BYTE *certData, + DWORD sizeOfCertData, + HCRYPTKEY *publicKey, + HCERTSTORE *certStore) +{ + CRYPT_DATA_BLOB blob; + CERT_CONTEXT *context; + if (!provider || !certData || !publicKey || !certStore) { + return CryptoX_Error; + } + + blob.cbData = sizeOfCertData; + blob.pbData = certData; + if (!CryptQueryObject(CERT_QUERY_OBJECT_BLOB, &blob, + CERT_QUERY_CONTENT_FLAG_CERT, + CERT_QUERY_FORMAT_FLAG_BINARY, + 0, NULL, NULL, NULL, + certStore, NULL, (const void **)&context)) { + return CryptoX_Error; + } + + if (!CryptImportPublicKeyInfo(provider, + PKCS_7_ASN_ENCODING | X509_ASN_ENCODING, + &context->pCertInfo->SubjectPublicKeyInfo, + publicKey)) { + CertFreeCertificateContext(context); + return CryptoX_Error; + } + + CertFreeCertificateContext(context); + return CryptoX_Success; +} + +/* Try to acquire context in this way: + * 1. Enhanced provider without creating a new key set + * 2. Enhanced provider with creating a new key set + * 3. Default provider without creating a new key set + * 4. Default provider without creating a new key set + * #2 and #4 should not be needed because of the CRYPT_VERIFYCONTEXT, + * but we add it just in case. + * + * @param provider Out parameter containing the provider handle. + * @return CryptoX_Success on success, CryptoX_Error on error. + */ +CryptoX_Result +CryptoAPI_InitCryptoContext(HCRYPTPROV *provider) +{ + if (!CryptAcquireContext(provider, + NULL, + MS_ENHANCED_PROV, + PROV_RSA_FULL, + CRYPT_VERIFYCONTEXT)) { + if (!CryptAcquireContext(provider, + NULL, + MS_ENHANCED_PROV, + PROV_RSA_FULL, + CRYPT_NEWKEYSET | CRYPT_VERIFYCONTEXT)) { + if (!CryptAcquireContext(provider, + NULL, + NULL, + PROV_RSA_FULL, + CRYPT_VERIFYCONTEXT)) { + if (!CryptAcquireContext(provider, + NULL, + NULL, + PROV_RSA_FULL, + CRYPT_NEWKEYSET | CRYPT_VERIFYCONTEXT)) { + *provider = CryptoX_InvalidHandleValue; + return CryptoX_Error; + } + } + } + } + return CryptoX_Success; +} + +/** + * Begins a signature verification hash context + * + * @param provider The crypt provider to use + * @param hash Out parameter for a handle to the hash context + * @return CryptoX_Success on success, CryptoX_Error on error. +*/ +CryptoX_Result +CryptoAPI_VerifyBegin(HCRYPTPROV provider, HCRYPTHASH* hash) +{ + BOOL result; + if (!provider || !hash) { + return CryptoX_Error; + } + + *hash = (HCRYPTHASH)NULL; + result = CryptCreateHash(provider, CALG_SHA1, + 0, 0, hash); + return result ? CryptoX_Success : CryptoX_Error; +} + +/** + * Updates a signature verification hash context + * + * @param hash The hash context to udpate + * @param buf The buffer to update the hash context with + * @param len The size of the passed in buffer + * @return CryptoX_Success on success, CryptoX_Error on error. +*/ +CryptoX_Result +CryptoAPI_VerifyUpdate(HCRYPTHASH* hash, BYTE *buf, DWORD len) +{ + BOOL result; + if (!hash || !buf) { + return CryptoX_Error; + } + + result = CryptHashData(*hash, buf, len, 0); + return result ? CryptoX_Success : CryptoX_Error; +} + +#endif + + +